Construction technology for broadening and reforming rigidity matching system of hollow slab bridge

Abstract

The invention discloses a construction technology for broadening and reforming a rigidity matching system of a hollow slab bridge. Rigidity matching members are mounted at the joined parts of new and old bridges and at the bottoms of slabs of the hollow slab bridges in adjacent areas, are transversely arranged along the hollow slab bridges and are arranged at the bottoms of side plates and inner plates of the new and old hollow slab bridges through connecting pieces; the number of the rigidity matching members is determined according the span L of the hollow slab bridges; and the lengths of the rigidity matching members is determined according to the widths of single plates of the new and old hollow slab bridges. According to the construction technology disclosed by the invention, due to the adoption of internal force transmission and rigidity transition of the rigidity matching members, the aims of reducing a transverse distribution peak of a load, easing a transverse distribution curve of the load and realizing the rigidity matching between each two bridge slabs of the new and old hollow slab bridges are achieved; and meanwhile, the integrity of transverse connection of the new and old bridge slabs is enhanced, and the problem that rigidity mutation occurs between connected parts of the new and old bridge slabs cannot be effectively overcome according to a transverse connecting method of an upper structure of a traditional hollow slab bridge is solved.

Description

technical field [0001] The invention belongs to the technical field of bridge widening and reconstruction construction, and in particular relates to a construction technique of a rigidity matching system for widening and reconstruction of hollow slab bridges. Background technique [0002] In recent years, with the rapid development of my country's economy and the substantial increase in car ownership and traffic volume, the traffic capacity of the originally built roads with few lanes has been increasingly unable to meet the requirements, and it needs to be widened and reconstructed. Taking expressways as an example, expressways built in the 1990s generally adopted the design standard of two-way four-lane highways, but most of the actual traffic volume now exceeds the original design maximum traffic volume, and widening and reconstruction are imperative. Bridge widening and reconstruction is the top priority of highway widening and reconstruction projects. Bridge widening a...

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Problems solved by technology

[0004] The invention provides a construction technique for the rigidity matching system of the widening and reconstruction of the hollow slab bridge, which solves the problem of abrupt change in stiffness between the connection parts of the old and new bridge slabs during the widening and reconstruction of the hollow slab bridge, and overcomes the problem of single slabs at the connection parts of the new and old hollow slab bridges. The unfavorable influence of the force strengthens the integrity of the connection between the old and new hollow slab bridges, and improves the construction quality and durability of the widening and reconstruction of the hollow slab bridges

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